Workflow Developer & Tester

Webbing; United States; Remote; USD 90,000 - 130,000; Full time

Job summary

Webbing ищет опытного backend-разработчика для реализации Temporal workflow на Go и поддержки инфраструктуры вокруг Inventory DB и REST API. Ваша работа охватит построение высоконагруженной системы учета SIM, проектирование таблиц PostgreSQL и создание инструментов импорта больших объемов данных.

Ожидается тесное взаимодействие с Senior Lead и участие в парном программировании. Требуется 2–4 года опыта, глубокое знание REST, PostgreSQL и Docker, опыт с очередями и мониторингом.

Qualifications

• 2–4 года backend разработки в продакшн- среде.
• Go или Java — основной язык; преимущество Go.
• REST API: разработка и тестирование API.
• PostgreSQL: проектирование таблиц, индексы, планы выполнения.
• Юнит и интеграционные тесты — обязанность.
• Git: ветви, pull requests, code review.
• Опыт работы с RabbitMQ, Kafka или Redis Pub/Sub.
• Базовые знания Kubernetes.
• Умение работать под руководством старшего лидера.
• Свободное владение английским.

Responsibilities

• Реализация Temporal workflow activities на Go: HSS и PCRF адаптеры, обновление Inventory.
• Покрытие юнит-тестами всех workflow-активностей с самого начала.
• Проектирование и создание Inventory Management Database (30 млн записей).
• Разработка bulk-импорт-сервисов: CSV → диапазоны ICCID/IMSI/MSISDN.
• Создание REST API для Inventory DB (allocate, reserve, release, query).
• Интеграционные тесты: workflow → mock NE → assertions в БД.
• Сопровождение старшего разработчика — парное программирование.
• End-to-end тестирование полного provisioning потока.
• Load и стресс тесты: имитация пиковых TPS.
• CI/QA автоматизация: пайплайны тестирования.
• HSS синхронизация IMSI-allocated-state (mock → real NE).
• MNP hooks в Inventory DB.
• UAT: репродукция багов, регрессионные тесты.

Skills

Go

Java

REST APIs

PostgreSQL

Unit testing

Integration testing

Git

Kubernetes

RabbitMQ

Kafka

Redis PubSub

Docker

Prometheus

Fluent English

Event-driven

Tools

Docker

Prometheus

Job description

Описание:

• Description - Implement Temporal workflow activities in Go: HSS adapter, PCRF adapter, Inventory update.


• Build and validate unit tests for all workflow activities from day one.


• Build the Inventory Management Database: tables, indexes, partitioning for 30M records.


• Build bulk import tooling: CSV → ICCID/IMSI/MSISDN range ingestion from vendor.


• Implement REST API endpoints for Inventory DB (allocate, reserve, release, query SIM records).


• Write integration tests: workflow → mock NE → database assertions.


• Support Sr. Developer on all workflow development tasks — pair programming expected.


• End-to-end test suite: full provisioning flow from SIM activation to order closed.


• Load and stress testing: simulate peak TPS provisioning against all systems.


• Test automation: CI pipeline integration for all workflow and API tests.


• HSS sync integration: IMSI allocation state reflected in HSS (mock → real NE).


• MNP (number portability) hooks in Inventory DB.


• UAT support: reproduce bugs, write regression tests, validate fixes.

Требования:

2–4 years backend software development in production environments. Go or Java — primary development language for this role is Go. Java accepted if strong fundamentals and willing to work in Go (we will support the transition). REST API development — building APIs consumed by other services and tested by automated suites. PostgreSQL — table design, indexes, writing queries, understanding query plans . Unit and integration testing — writing tests is a first-class responsibility, not an afterthought. Git — branching, pull requests, code review participation. Experience with event-driven architectures using RabbitMQ, Kafka, or Redis Pub/Sub. Basic Kubernetes knowledge — understanding how your workloads are deployed. Ability to work under technical direction of a senior lead and execute quickly. Fluent English.

• Any workflow engine experience: Temporal, Camunda, Apache Airflow, AWS Step Functions.


• Telecom or BSS/OSS background — understanding of SIM lifecycle, provisioning, activation.


• Test framework experience: Go testing, Testify, mock frameworks.


• Load testing tools: k6, Locust, JMeter — running and interpreting results.


• Docker — building and running containerised services.


• Experience with event-sourced or append-only database patterns.

Temporal.io SDK experience — even personal/side project counts. Python — useful for scripting, test tooling, data processing. Prometheus — understanding how to instrument code with metrics. Telecom protocol familiarity: Diameter, SS7, SMPP.

Условия:

Founded in early 2010, Webbing is a global data MVNO that delivers enterprise grade, global connectivity and IoT services across more than 200 countries and 600+ mobile carriers' networks. Webbing's secured network delivers network protection and web content intelligence. Enterprise customers can manage, monitor, and optimize data usage in real-time with Webbing's powerful software platform. Gain visibility by application type and have the power to white list applications and limit non-business applications with the click of a button, saving money and improving compliance. Fully remote An exciting and challenging greenfield platform with great skill and knowledge development opportunities. The opportunity to join a team of highly professional specialists in an international environment. The opportunity for professional development within a reputable international innovative and growing company.